Oral: Airflow Resistance of 3-D Printed Porous Plugs

An important characteristic in determining the acoustic impedance of porous materials is the resistance to airflow in the material. This study will focus on measuring the airflow resistance of 3-D printed material with circular pores The goal of this study is twofold. First, to design a device that can successfully and accurately measure the volumetric airflow rate through the porous media and the differential pressure across it in order to determine the specific airflow resistance of a porous media. Second, to study the dependence of the flow resistance on porous properties of the material. The device measures the pressure just before and just after a 3-D printed, porous plug. The volume airflow rate is measured at the output end of the device. Data from a number of different pore sizes and porosities will be presented.